The flow of complex fluids in porous media widely exists in nature and industrial production.It is of great significance to study the influence of non-Newtonian characteristics of complex fluids on the flow in porous media.Based on the constitutive equation of viscoelastic fluid,the three-dimensional porous media model with random accumulation of particles was studied,and the influence of fluid rheological properties on the flow characteristics in porous media was obtained.It was found that the rheological properties of the fluid had a significant effect on the pressure drop and permeability of the flow in the porous media flow field.For viscoelastic fluid,with the increase of relaxation time,the elastic enhancement of fluid led to the increase of pressure drop and permeability in the flow field.When the migration factor characterizing the shear thinning effect increased,the pressure drop inside the flow field decreased and the permeability increased.
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